package com.zifeng.android_des;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

public class DES {
	private static byte[] iv = {1,2,3,4,5,6,7,8};
	public static String encryptDES(String encryptString, String encryptKey) throws Exception {
//		IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]);
		IvParameterSpec zeroIv = new IvParameterSpec(iv);
		SecretKeySpec key = new SecretKeySpec(encryptKey.getBytes(), "DES");
		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
		cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
		byte[] encryptedData = cipher.doFinal(encryptString.getBytes());
	 
		return BASE64.encode(encryptedData);
	}
	public static String decryptDES(String decryptString, String decryptKey) throws Exception {
		byte[] byteMi = new BASE64().decode(decryptString);
		IvParameterSpec zeroIv = new IvParameterSpec(iv);
//		IvParameterSpec zeroIv = new IvParameterSpec(new byte[8]);
		SecretKeySpec key = new SecretKeySpec(decryptKey.getBytes(), "DES");
		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
		cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
		byte decryptedData[] = cipher.doFinal(byteMi);
	 
		return new String(decryptedData);
	}
}